common/cmd_bootldr.c

   1 /*
   2  * U-boot - bootldr.c
   3  *
   4  * Copyright (c) 2005-2008 Analog Devices Inc.
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * Licensed under the GPL-2 or later.
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <command.h>
  15
  16 #include <asm/blackfin.h>
  17 #include <asm/mach-common/bits/bootrom.h>
  18
  19 /*
  20  * the bootldr command loads an address, checks to see if there
  21  *   is a Boot stream that the on-chip BOOTROM can understand,
  22  *   and loads it via the BOOTROM Callback. It is possible
  23  *   to also add booting from SPI, or TWI, but this function does
  24  *   not currently support that.
  25  */
  26
  27 int do_bootldr(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  28 {
  29         void *addr;
  30         uint32_t *data;
  31
  32         /* Get the address */
  33         if (argc < 2)
  34                 addr = (void *)load_addr;
  35         else
  36                 addr = (void *)simple_strtoul(argv[1], NULL, 16);
  37
  38         /* Check if it is a LDR file */
  39         data = addr;
  40 #if defined(__ADSPBF54x__) || defined(__ADSPBF52x__)
  41         if ((*data & 0xFF000000) == 0xAD000000 && data[2] == 0x00000000) {
  42 #else
  43         if (*data == 0xFF800060 || *data == 0xFF800040 || *data == 0xFF800020) {
  44 #endif
  45                 /* We want to boot from FLASH or SDRAM */
  46                 printf("## Booting ldr image at 0x%p ...\n", addr);
  47
  48                 icache_disable();
  49                 dcache_disable();
  50
  51                 __asm__(
  52                         "jump (%1);"
  53                         :
  54                         : "q7" (addr), "a" (_BOOTROM_MEMBOOT));
  55         } else
  56                 printf("## No ldr image at address 0x%p\n", addr);
  57
  58         return 0;
  59 }
  60
  61 U_BOOT_CMD(bootldr, 2, 0, do_bootldr,
  62         "bootldr - boot ldr image from memory\n",
  63         "[addr]\n"
  64         "    - boot ldr image stored in memory\n");